Hi Amish,
telnet 10.10.12.21 25 (my private IP) {output is 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)} So can I conclude that the external mails are not being relayed?
No. This means that your 10. series of IPs does not have relaying access. You need to have 10.1.12.:allow,RELAYCLIENT="" in your tcp rules too to allow the 10.1.12.* subnet to relay mail.
And the messages are for external hosts, 20 Dec 2002 03:09:33 GMT #58808 4955 <> remote bounce.1194.39868523@bounce.bnb4.com 19 Dec 2002 17:21:14 GMT #58786 3714 <> remote adp501@friendly984send.com So my server is probably relaying mails, most seem to be bouncing mails.
These are not relayed mails. These mails have come to the system from remote hosts for local recipients and are now bouncing. These messages are from spammers with invalid MX pointers. These mails will remain in queue and eventually bounce to postmaster.
- Mayank